通过键盘，可以将英文字母、数字、标点符号输入到计算机中，因而可以向计算机发出命令。

Through a keyboard, English letters, Numbers and punctuation can be inputted into the computer, so keyboards can say the words.

youdao

省略可选的分号意味着更少的符号输入和更少的符号混乱。把各个语句隔离到它们自己单独的行上面可以提高你的代码的可读性。

Omitting optional semicolons means fewer characters to type and fewer characters to clutter your code. Breaking separate statements onto their own lines increases your code's readability.

youdao

如果您不知道如何键入引号，请参阅我的输入重音符号页面。

If you don't know how to type guillemets, see my page on typing accents.

youdao

Well, it's a prefix most of the symbols in this function with just an asterisk, with a * from the keyboard so Shift-8.

好的，在这个函数中它是一个前缀符号,就是一个星号，在键盘中用Shift-8输入。

哈佛公开课 - 计算机科学课程节选